Alongside these fine words, written by Machine Head superfan Dom Lawson, is a kickass photoshoot, featuring two sides of Robb – one of which is screaming a little bit louder than the other. But how did it come together?

"For this cover we got to work with Steve Brown, who has shot many covers for us in the past," says Metal Hammer Art Editor Lewis Somerscales. "I had seen one of his personal projects from a few months previous, and when the plan for the Robb Flynn cover started coming together, it was something I really wanted to do. I've worked with Robb in the past on other projects, and fortunately he's one of those guys who really gets an idea, and delivers every time.

"The initial idea was to play on the Catharsis album title, the idea that Robb was releasing rage in some way without making it too obvious," Lewis continues. "We shot this all in a studio in London using clever camera tricks with flash and long exposure rather than being overdone in Photoshop. This meant that a very patient Robb had to repeat certain movements until we go the exact shot we needed."

Check out the exclusive behind the scenes gallery below to get a glimpse behind the curtain.